ChanServ changed the topic of #ffmpeg to: Welcome to the FFmpeg USER support channel | Development channel: #ffmpeg-devel | Bug reports: https://ffmpeg.org/bugreports.html | Wiki: https://trac.ffmpeg.org/ | This channel is publically logged | FFmpeg 7.1.1 is released
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<iconoclasthero>
i have an audio file (chapter from an audiobook) that's giving me this error with ffprobe/ffmpeg:
<iconoclasthero>
`[ogg @ 0x5a285abb2e00] Unsupported huge granule pos -17' '[ogg @ 0x5a285abb2e00] Packet processing failed: Invalid data found when processing input'
<iconoclasthero>
vlc will play it. i tried to reencode (-acodec libopus) and remux (-acodec copy) and i get '[in#0/ogg @ 0x58c48a9fbcc0] Error during demuxing: Invalid data found when processing input' with both and an empty file.
<iconoclasthero>
anything else i can do here?
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<linsux>
i convert a file but the destination lost subtitles included in original video
<linsux>
what's the argument to include the subtitles
<ePirat>
make sure to use -map 0 if you want to map all streams to the output
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<linsux>
when you say all streams, stream can be video, audio or subtitles?
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<linsux>
Automatic encoder selection failed Default encoder for format mp4 (codec none) is probably disabled. Please choose an encoder manually.
<another|>
full cmd line?
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<BtbN>
I don't think mp4 can hold all the subtitle formats that mkv can, and "transcoding" subtitles doesn't really work all that well
<linsux>
so what should i do
<linsux>
i need to shrink movies
<ePirat>
you wont shrink anything by changing the container to mp4
<linsux>
so what should i do. shink same mkv to another smaller mkv
<linsux>
how about i distract a srt file from that mkv?
<ePirat>
if you want to reduce the size, re-encode and just leave them as mkv. You probably need to play around with parameters for a while to find acceptable quality-size tradeoff for you for the output
<BtbN>
10bit HEVC is already pretty dang efficient
<BtbN>
so unlikely you can make it much smaller without trashing the quality
<BtbN>
assuming whoever encoded it didn't use stupid settings
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<linsux>
very complicated
<beastd>
BtbN,ePirat,linsux: I think if it wasn't actually re-encoded from bluray the files could be really big because of padding in the video stream? think i encounterd that, but maybe i'm confusing it with sth else.
<BtbN>
it's hevc, I don't think that can be on bluray, can it?
<furq>
uhd bluray is hevc
<BtbN>
This is 1080p tho
<furq>
right
<BtbN>
it's also a file from a release group, I doubt they waste space and bandwidth with padding
<ePirat>
where you can save a bit usually is if they didnt cut off the black bars
<BtbN>
wenn, the black bars are often where the subs are rendered though
<BtbN>
so if you change the resolution, the subtitles break
<BtbN>
*well
<ePirat>
right but thats what I meant, it all depends on the tradeoffs you are willing to do
<ePirat>
and what subs you have
<BtbN>
ffmpeg-user is still migrating btw.
<BtbN>
will approximately take 2h to import the archives
<ePirat>
wow
<BtbN>
and it's only 25% of the size of ffmpeg-devel
<ePirat>
thats really slow
<BtbN>
it's taking every mail from the mbox, parses it, assigns it to a user, makes one if it doesn't exist, and so on
<BtbN>
and also full-text-search indexes it
<ePirat>
can it not parallelize this?
<BtbN>
not sensibly
<BtbN>
it has to make sure it parses the start of threads first
<BtbN>
It's also a very rare operation. So I doubt anyone wants to hyper-optimize that code and make it less obvious
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<furq>
the bluray padding thing relies on annex b i think
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<furq>
at least for avc
<BtbN>
I don't think there are any 10bit h265 1080p blurays
<furq>
but also that's not a remux anyway
<furq>
right
<BtbN>
that's gonna be a reencode already
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<linsux>
i only want to shrink a file as quick as possible, plus subtitle inside the source file, the subtitle can either be a separated srt file or inside the destination file
<BtbN>
I'm sure that's not your only constraint
<BtbN>
cause "as quick as possible" will result in "unwatchable pixel mush"
<linsux>
the -c:v copy is faster than encoder ?
<linsux>
so i use that
<BtbN>
well yes, because it doesn't encode
<BtbN>
but it also literally copies
<BtbN>
so nothing will change
<linsux>
if nothing change, why output file is smaller
<linsux>
what is shrunk
<BtbN>
you either omitted something, or used a more efficient container
<BtbN>
mpegts has pretty high overhead for example